First, relying on plans some corporate leadership states is the opposite of a decentralized approach.

Second, permissionless does not mean decentralized. You can have all validation of a POS chain ending up on a single computer.

From your link:

    In March 2023, the New York Times identified a list of
    just 34 Bitcoin mining facilities (controlled by 22
    different entities) in the United States, which
    represented about a third of the total worldwide
    Bitcoin mining network at the time.

If we extrapolate from that, it would be 66 entities that control 100% of Bitcoin mining. Miner revenue is somewhere about $50M per day. So on average one of those miners makes very roughly $1M per day, say $365M per year.

34 such $365M/year entities would have to collude to attack bitcoin. And accept that their business is severely damaged afterwards.

So much for the decentralization and security of Bitcoin.

How does the situation look like in other chains?